CentOS 7 solves multi-version protection

Recently, when updating CentOS and installing Oracle, I always encountered package multi-version protection, so I will record it when the process is completed.

Reference link : Multilib version problems when CentOS 7 is updated .

1. Phenomena

错误： Multilib version problems found. This often means that the root
      cause is something else and multilib version checking is just
      pointing out that there is a problem. Eg.:
      
        1. You have an upgrade for ncurses-libs which is missing some
           dependency that another package requires. Yum is trying to
           solve this by installing an older version of ncurses-libs of the
           different architecture. If you exclude the bad architecture
           yum will tell you what the root cause is (which package
           requires what). You can try redoing the upgrade with
           --exclude ncurses-libs.otherarch ... this should give you an error
           message showing the root cause of the problem.
      
        2. You have multiple architectures of ncurses-libs installed, but
           yum can only see an upgrade for one of those architectures.
           If you don't want/need both architectures anymore then you
           can remove the one with the missing update and everything
           will work.
      
        3. You have duplicate versions of ncurses-libs installed already.
           You can use "yum check" to get yum show these errors.
      
      ...you can also use --setopt=protected_multilib=false to remove
      this checking, however this is almost never the correct thing to
      do as something else is very likely to go wrong (often causing
      much more problems).
      
      保护多库版本：ncurses-libs-5.9-14.20130511.el7_4.i686 != ncurses-libs-5.9-13.20130511.el7.x86_64

Two, solve

1. Query the name of the package

[root@centos7-18 database]# yum list installed ncurses-libs*
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * epel: d2lzkl7pfhq30w.cloudfront.net
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
已安装的软件包
ncurses-libs.x86_64                                                                                                   5.9-13.20130511.el7                                                                                                     @anaconda
ncurses-libs.x86_64 

2. Get multiple versions of a package

[root@centos7-18 database]# rpm -q ncurses-libs.x86_64
ncurses-libs-5.9-13.20130511.el7.x86_64
ncurses-libs-5.9-14.20130511.el7_4.x86_64 

3. Delete unwanted versions

[root@centos7-18 database]# rpm -e ncurses-libs-5.9-13.20130511.el7.x86_64

If you encounter dependencies, try to upgrade the dependent packages